Ice-shaving machine.



No. 685,5I7. Patented Oct. 29, I90I. F. H. LIPPINCOTT.

ICE SHAVING MACHINE.

(Application led Apr. 11, 1900.)

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Patented oct. 29, |901. F H LIPPINCUTT ICE SHAVING MACHINE.

(Application viled Apr. 11, 1900.)

2 sheetsshet 2.

(No Model.)

W/TNESSES UNITED STATES PATENT OFFICE.

FISHER H. LIPPINCOTT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO AMERICAN SODA FOUNTAIN COMPANY, OF JERSEY CITY, NEW JERSEY,

A CORPORATION OE NEW JERSEY.

ICE-SHAVING MACHINE.

SPECIFICATION forming part of Letters Patent N o. 685,517, dated October 29, 1901. Application filed April l1, 19 00. Serial No. 12,449. (No model.)

To all whom it may concern: A

Be it known-that I, FISHER H. LlPPINoOTT, a citizen of the UnitedStates, residingat the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Ice-Shaving Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, of which- 1e Figure l is a side elevation; Fig. 2, a section as on line 2 2, Fig. l; Fig. 3, an enlarged section on line 3 3, Fig. l Fig. 4, an enlarged section on line 44, Fig. l; Fig. 5, a section as o n line 5 5, Fig. 4, omitting certain parts; Fig. 6, a section, broken away, similar' to Fig. 3, but showing t.he.screwthreaded shaft at its forward limit.

. This invention relates to that kind of iceshaving machines in which is comprised a zo suitable receptacle for the ice, cutting-knives in a slot or opening in one end of the latter, and a disk or head within said receptacle,- which head is fixed to the end of a screwthreaded shaft that is rotatable in screw- 2 5 threaded bearings of or connected to said receptacle. By suitablyturning said shaft ice placed within the receptacle in front of the piston-head willbe gradually forced against said cutting-knives, It has been customary 3o in this kind of machines to employ a construction whereby when it Yisdesired to enable the threaded shaft with its head to be quickly retracted so as to return the latter to the position farthest away from the cutting- 3 5 knives-that is, into position to operate upon a new supply of ice-the threads ofthe shaft may be disengaged from the threaded bearings and retracted and then again engaged with said bearings.

4Q My invention relates to means whereby the disengagement ofthe shaft from the threaded y bearings and thevreturn of the same to the normal or operative position are greatly facilitated.

The invention also relates to means for ob` viating liability of the head on the end of the said shaft coming` into contact with the cutting-knives, and thus injuring the samealso liability of straining or breaking some part 5o of the machine.

i The invention relates, further, to certain details of construction hereinafter pointed out. t The exact nature of the improvement and invention will be hereinafter .clearly described, reference being had to the drawings accompanying this specification and forming a part thereof.

In said drawings, l designates the usual icereceptacle of cylindrical form that is mounted on a standard 2 and is provided with 6o an opening at the top (not shown) through which the ice is placed in the receptacle. At-

,the forward end of the latter is a head l,

having the usual slot or opening s, and ice cutting or shaving knives c, Fig. 3. At the other or rearend of the receptacle isaheadl".

4 is a central horizontal shaft extending into the receptacle, on the inner end of which shaft is fixed a head ordisk 4a, withtheusual pins or projections 4b, that are adapted to en- 7o ter the ice so as to insure the rotation of the latter when the shaft is rotated. This shaft v extends freelythrough openings in the end vof a box or support 5, that is secured'to the `in opposite directions inA guideways 52L of the box 5 away from the shaft 4when itV is de sired to throw them out of engagement with the shaft, as hereinafter described. On the upper and lower sides of the said pieces are 4sets of projections 7 and between opposite ones Ythereof a helical expansion-spring 8, that tends toforce the said pieces lapart- 9o that is, away from the shaft4. The said pieces are,l however, normally maintained in engagement with the shaft bymeans-of twov vertical bars 9,. adapted to work in suitable guideways l0 of the box 5. Theinner side 95 of the upper part of each ofthe bars is inclined or iiared outwardly at 9, as seen in Figs. 2 and 4. The inclined part of one of the bars bears against vthe outer side of one y of the pieces 6 and the corresponding part of rco bars 9, normally in the elevated position shown in the drawings against the stress of springs 8, which, as before mentioned, tend to separate the pieces 6.

The lever 13 has an extension 13 to receive the foot of the operator, which if placed on said extension with a downward pressure will cause the rod 12, and consequently the bars 9, to descend, and as they descend the pieces or half-nuts 6 will be permitted to slide apart in their bearings by the stress of the springs 8, and finally the pieces will be entirely disengaged from the shaft. The latter may then be readily retracted in order to bring back the head 4 of shaft 4 adjacent to the rear end of the receptacle. The pressure on the lever 13 being now released and the bars moving up by the action of the spring 14 on the lever their inclined sides press the pieces 6 toward each other until their threads again engage the threads of the shaft. A supply of ice being placed within the receptacle (through the opening in the top before referred to) the shaft 4 is rotated in the proper direction by turning a crank 15 on the end of the shaft projecting beyond the box 5. It will be obvious that the ice will be rotated and at the same time gradually advanced against the cutting-knives, the shavings passing out of the slot s, whence they may be received by a vessel placed upon a support 2, extending horizontally from the standard 2. In order to facilitate the retraction of the shaft 4 when the pieces 6 are disengaged therefrom, as before described, and also to avoid marring the threads of the shaft, I usu ally provide two transverse sheaves 16, one at each end of the box 5, as seen in Fig. 2 and indicated by dotted lines in Fig. l. These sheaves are mounted on suitable shafts 16 and are in position to receive the shaft when the pieces 6 are disengaged therefrom, as clearly shown in Fig. 2.

I shall now describe the means or devices which I employ in order to prevent the head 4 or its studs 4b from coming into contact with and thus damaging or dulling the cutting-knives. Particular reference being now had to Figs. 3 and 6, it will be seen that the pieces 6 are provided with screw-threads only at and adjacent to the ends thereof, the inter vening portion 6 being devoid of threads. It will also be observed that the shaft 4 is devoid of screw-threads for a certain distance at y, Figs. 3 and 6, and also that there is a part a' of the shaft beyond the outer end of the threaded portion that is devoid of the threads. The length of the threaded part between the plain or unthreaded part 'y and ,z is preferably somewhat less than the length of the before-mentioned unthreaded portion 6 of the pieces 6. The relative arrangement of the said threaded and unthreaded parts is such that at a point in the advance movement of the shaft 4, which point is when the head 4, or rather the projections 4b thereof, has been brought in proximity to the forward head 1 of the receptacle, the threaded part of the shaft in advance of the plain part y passes beyond the threads of the forward end of the pieces 6, while the threaded part of the shaft between the plain parts y and e of the shaft passes on beyond the-threads of the rear ends of the said pieces, the said two plain portions of the shaft then coming, respectively, opposite the threaded parts of the pieces 6, all as seen in Fig. 6. Thus, while the turning of the shaft may continue it cannot then advance, and so the projections 4b cannot come into contact with the head 1 of knives. In order to prevent accidental pushing in of the shaft after it has reached the inoperative position, as just described, it is necessary to provide a suitable stop. In the present instance the part o of the shaft beyond the plain portion e is enlarged, thus forming an offset that stops against the rear end of the pieces 6, or such stop might be had by the hub 15 of the crank 15 abutting against the end of the box 5, as seen in Fig. 6.

In order to insure that a part of both of the threaded portions of the shaft 4 shall always engage the threaded parts, respectively, of the pieces 6 until both of said threaded parts of the shaft shall pass out of engagement with the respective threaded parts of the pieces simultaneously, I make the rear threaded part of said pieces of somewhat greater length than the threaded part of the forward end of the pieces, as shown in Figs. 3 and 6. This difference in length of said threaded portions with relation to the threaded and plain portions of the shaft 4 is such, as shown, that when the threaded part of the latter forward of the plain part y of the shaft escapes from the forward threaded part of the pieces 6 the threaded portion of the shaft to the rear of said plain part at the same time escapes from the rear threaded part of said pieces.

I do not limit myself to the precise form of the invention shown in the drawings, as the same may be varied without departing from the principle of the invention. For example, there may be used in lien of the expansionsprings similar springs, but tending to draw the pieces toward each other and the shaft, and the bars, doc., constructed and arranged to force the pieces apart against the stress of such springs.

though I have described the invention as embodied in a machine for shaving ice the same may be applied to other purposes.

Having thus described my invention, I

I may also remark that al-4 IIO Vdisk on said shaft, the box, the pieces adapted to slide in guideways of said box and having screw-threads adapted to engage the threads of said shaft, the springs acting on said pieces, the longitudinally-movable bars having the inclined sides adapted to engage the sides of said pieces, whereby their threads are normally held in engagement with the threads of said shaft, substantially as and for the purpose set forth.

2. In a machine of the kind recited, the combination of the receptacle, the cuttingknives, the rotatable screw-threaded shaft extending within said receptacle, the head or disk on said shaft, the box, the spring-controlled pieces adapted to slide in guideways of the latter, and having screw-threads adapted to engage the threads of said-shaft, the bars having the inclined sides adapted to engage the sides of said pieces, the spring-controlled lever, and the rod connecting said 1ever and bars, substantially as and for the purpose set forth.

3. In a machine of the kind recited, the combination of the receptacle, the cuttingknives, the rotatable shaft extending within said receptacle, and having the forward and rear threaded portions, and the portion devoid of threads intervening between said threaded portions, and having also the portion devoid oi threads beyond the 'outer end of said rear threaded portion, the slidable pieces having the end portions thereof provided with screw-threads adapted to engage the threads of said shaft, and having the intervening portion devoid of threads of somewhat greater length than that of the said rear threaded portion of the shaft, means for main-A taining said pieces normally in position wherein their threads will be in engagement with the threads of the shaft, and means for effecting a sliding movement in opposite directions to disengage the same from said shaft,

substantially as and for the purpose set forth.

4. In a machine of the kind recited, the combination of the receptacle, the cuttingknives, the rotatable screw-threaded shaft extending within said receptacle, the separable pieces having screwthreads adapted to engage the threads of said shaft, means for maintaining said pieces normally in position to engage the threads of said shaft, means for moving said pieces in opposite directions l to disengage theV same from said shaft, together with the rollers normally out of con` tact with said shaft,- and adapted to receive 

